Drawing mechanism for textile rovings



Q May 11, 1954 R. BALMES SOLANAS 2,677,857 DRAWING MECHANISM FOR TEXTILE ROVINGS Filed May 23, 1949 2 Sheets-Sheet 1 IN V EN TOR. Eamon Balmw o y 11, 1954 R. BALMES SOLANAS 2,677,857

DRAWING MECHANISM FOR TEXTILE ROVINGS Filed May 23, 1949 2 Sheets-Sheet 2 INVENTOR.

Eamon Ball/1&9 Jolaaqa,

Patented May 11, 1954 2,677,857 DRAWING MECHANISM'FOR TEXTILE ROVIN G Solanas, Santa Coloma dc Ger- Ramn. Balmes vello, Spain, assignor to Estirajes.Balmes,.S.A.,

Barcelona, Spam Application May 23, 1949,.Serial No. 94,8414 Claims priority, application Spain June8, 1948 Claims.

1 In the drawing mechanisms of textile rovings mployed 1n spinning tomary to arrange at the angle formed by the two final or outlet drawing rollers or cylinders a condenser or reducer of the width of the roving. These condensers or reducers are in general constituted by a small part provided with an opening of conical or funnel shape through which the roving is passed, so that the taper of this opening groups the fibres of the roving as the latter passes through the condenser.

The employment of these condensers or reducers nevertheless gives rise to certain difiiculties, since, as it is expedient that the reducer should be fitted as exactly as possible into the angle formed by the two final cylinders in order not to disturb the working ofthe mechanism, it has to be a part of very small dimensions, which is diificult to move.

In order to support this reducer in the angle of the two front or outlet cylinders a frame has been used with a horizontal rod which is parcylinders, and on which the reducer position without being able to fall.

This frame represents a certain complication in the working of the drawing mechanism, for which reason its use is not practical, and in many cases a reducer is employed which is formed by a small and completely loose part located in the angle formed by the two outlet cylinders, and preferably provided with a handle or extension directed upwards in order to facilitate its manipulation.

of these machines usually possess.

With thisarrangement the reducer works well but it has the disadvantage that when for any by providing a special mounting of the reducers,

front cylinder, cannot drop, rect position.

The invention consists essentially in coupling the reducers in pairs, uniting the two reducers of each pair to each other by means of a frame or bridge, which may be formed by a simple piece of stamped metal sheet rigidly joined to the two reducers, or by a piece of wire articulated to the extremities of the usual extensions orhandles of the reducers. In both cases, this bridge for connecting the two reducers is higher than these latter, and does not render in the sli-ghest degree more diihcult the working of the cylinders of the drawing mechanism.

The drawing mechanisms, both of spinning and preparing machines, are always constructed in pairs, so that the upper cylinders are double and correspond to two contiguous drawing sets or mechanisms. These upper cylinders are supported by means of supports into which they fit with their end journals, so that between each two supports are comprised tWo drawing sets or mechanisms.

According to this invention, thepair of reducers united by the bridge may be so arranged that it corresponds to the two drawing mechanisms of the same pair of mechanisms, but in many cases it is of greater'advantage to arrange the two reducers in such away that they correspond to two drawing mechanisms of two contiguous pairs, for which purpose the bridge joinbut remain in coring the two reducers is made of a sufiicient height to be able to inders.

In this way it is ensured that the reducers cannot fall, since when the upper cylinder of a pair of drawing mechanisms is withdrawn, its reducers remain in th correct position, supported by the reducers of the mechanisms of the neighbouring pairs, the cylinders of which have not been withdrawn.

pass above the supports of the cyl- A drawing mechanism, embodying the inven tion is illustrated by way of example in the accompanying drawings, in which:

Figure 1 shows a vertical section of the mechanism on a plane transverse to the cylinders or rollers, with the reducers united by a rigidbridge;

Figure 2 is a view from above, assuming the upper cylinders to be removed;

Figure 3 is a front view of a pair of reducers with a rigid connecting piece; and

Figures 4 and 5 are examples of alternative forms in accordance with which the bridge or in which these, on the withdrawal of the upper connecting part is of wire and is articulated to the upper ends of the rigid handles of the reducers.

The mechanism shown comprises various pairs of rollers or cylinders, and in particular it comprises a pair of final or outlet cylinders l, 2, and close to these a pair of cylinders 3, 4, which pass the roving to the final cylinders.

The upper cylinders 2 and 4 of this mechanism are mounted in the usual manner, resting on the lower cylinders l and 3 and supported by the support ports II], II passed over the rod 9.

In the majority of cases it is arranged that the cylinders 3, 4 shall pass the roving at the least distance possible in practice from the final cylinders l, 2, for which reason the cylinder 4 is made of small diameter and completely free, so that it will exert on the fibres only a slight pressure, and will allow the fibres to slip between the cylinders 3 and 4.

The roving reducer has to be located in the angle between the cylinders l and 2, and in the space which remains between these cylinders and the cylinders 3 and 4, which, as has been mentioned, is always small, and for this purpose each of the reducers 5 is formed by a small part approximately triangular in section, which is so arranged so as to be fitted in the angle formed by the cylinders l and 2 and provided with an approximately conical or funnel-shaped opening, preferably open at the lower part, in order to facilitate the threading of the roving.

The improvements which are the subject of this invention consist in coupling the reducers 5 in pairs by means of a connecting or coupling part which forms a bridge and is higher than the i reducers. In the example of construction shown in Figure 3, this coupling bridge is formed by a part B of stamped metal sheet rigidly united to the two reducers 5. The distance between these two reducers 5 is so selected as to correspond to the normal space between two contiguous rovings. This connecting piece 6 is preferably provided at its central part with a small extension l directed upwards, which forms as it were a handle for facilitating the gripping of the pair of reducers.

The pair of reducers united in this way may be so placed that it works in two drawing mechanisms arranged one on each side of the support 10, l l of the upper cylinders 2, 4 and in this case the central part of the connecting member 6 passes over the rod 9 of the support and remains fitted in the space between the two supporting parts :0 and i i, corresponding to the upper cylinders 2 and 4 respectively. By making this part 6 of simple sheet metal, of steel or other material, and either completely flat or with some small reinforcing rib, it can slide perfectly into the space between the supporting parts without any diiiiculty.

By arranging the reducers in this manner the result is that when the upper cylinder of one of the drawing mechanisms on one side of the support is withdrawn the corresponding reducer cannot fall, since in practice the upper cylinders of the mechanisms on both sides of the support are not withdrawn simultaneously, so the other reducer of the pair remains fitted in its place and is supported by the corresponding upper cylinder.

The reducers may alternatively be so placed in accordance with this invention that they correspond to the two drawing mechanisms of the same pair, that is to say, the connecting part of the reducers does not embrace the support of the cylinders. In this case, on the upper front cylinder being withdrawn, the two reducers might fall, and in order to prevent this the connecting part 6 is provided, as shown in Figure 2, with an extension 8, on each side. Then on placing the reducers so that they correspond to the same pair of drawing mechanisms these extensions 8 are retained by the supports l0, H.

In Figure 4 an alternative form is represented in accordance with which the reducers are articulated to the coupling bridge, so that they may have a certain play of movement. For this purpose each of the reducers 5 has an extension or handle i2 directed upwardly, at the end of which is formed a hole 13. By means of these holes the two reducers of each pair are coupled to each other by means of a piece of wire M, which has its ends doubled, forming hooks l5, which pass through the holes l3 in the reducers. In this way each of the reducers 5 can oscillate sideways independently, rotating, owing to the hole l3, about the lower part of the hook IE, but in addition, as this hook is not completely closed but has a certain clearance, the reducer may also have a certain movement of oscillation to the front and rear.

The result of this arrangement is in the first place that even when the lateral or swinging displacements of the two rovings are not absolutely equal, the reducers can adapt themselves with complete freedom to these displacements, and always efiect satisfactorily the reduction of the diameter of the roving, and in the second place that each of the reducers can also adapt itself exactly to the angle formed by the two cylinders l and 2 independently of the other reducer.

In Figure 5, a slight variation is shown in the arrangement of the piece of wire l4 which joins the two reducers, which in this case has at the central part a curve 16 directed upwards, which facilitates the gripping of this member by its middle portion when it is desired to withdraw the two reducers from the machine. In place of this curved wire it is also possible to employ a small member made of synthetic resin or other moulded material.

I claim:

1. In drawing mechanism for textile rovings used in spinning or preparing machines, having a plurality of drawing sets with upper and lower outlet cylinders, supports for said upper cylinders and a reducer of the width of the roving situated in the inlet angle formed between the upper and lower outlet cylinders of each set, the improvement comprising a bridge member interconnecting the reducers of two drawing sets separated by a support for the upper cylinders, said bridge member extending above and at a greater height than said reducers.

2. In drawing mechanism for textile rovings used in spinning or preparing machines, having a plurality of drawing sets with upper and lower outlet cylinders, supports for said upper cylinders and reducers of the width of the roving situated in the inlet angle formed between the upper and lower outlet cylinders of each set, the improvement comprising a bridge member interconnecting the reducers in pairs, said bridge member extending above and at a greater height than said reducers, the two reducers connected by said bridge member corresponding with two drawing sets separated by said support.

3. Drawing mechanism as claimed in claim 2, wherein said bridge member interconnecting said reducers of each pair is formed by a piece of stamped metal sheet, united rigidly to said reducers.

6 References Cited in the file of this patent UNITED STATES PATENTS Number Number Name Date Butler June 17, 1930 Casablancas July 2, 1932 Casablancas Sept. 12, 1933 Piron Feb. 12, 1935 Casablancas Feb. 19, 1935 Schlums May 10, 1949 FOREIGN PATENTS Country Date France Apr. 21, 1931 

